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Updated: May 28, 2026
Stimulus-specific Cortical Visual Evoked Potential Morphological Patterns
Published on: May 12, 2019
EEG Evidence for Dynamic Cross-Modal Adaptation Under Progressive Visual-Tactile Impairment
Hanbo Yang1, Yi Wang1,2, Yicheng Sun1
1School of Mechanical Engineering, Xi'an University of Technology, Xi'an 710048, China.
Background:
This study examined condition-dependent electroencephalography (EEG) changes under progressive degradation of visual and tactile information.
Methods:
Using a controlled visual-tactile paradigm, we systematically manipulated visual degradation and tactile impairment at multiple levels and analyzed time-frequency activity and P300 responses.
Results:
The results showed condition-dependent changes in oscillatory activity and P300 amplitude across graded visual-tactile degradation conditions. In several conditions, degradation in one modality was accompanied by increased neural responses in the other modality. However, this pattern was not monotonic: stronger responses were observed under some moderate degradation combinations, whereas responses were reduced under severe dual-modal degradation.
Conclusions:
In addition, the relative balance between visual-task and tactile-task responses varied across conditions, suggesting flexible but condition-dependent changes in modality weighting rather than a fixed hierarchy between modalities. Overall, these findings are consistent with graded neural adaptation under visual-tactile uncertainty, but they do not by themselves establish a specific causal mechanism of sensory reallocation.
